<template>
  <view class="uni-steps">
    <view :class="[direction === 'column' ? 'uni-steps__column' : 'uni-steps__row']">
      <view
        :class="[
          direction === 'column'
            ? 'uni-steps__column-text-container'
            : 'uni-steps__row-text-container',
        ]"
      >
        <view
          v-for="(item, index) in options"
          :key="index"
          :class="[direction === 'column' ? 'uni-steps__column-text' : 'uni-steps__row-text']"
        >
          <text
            :style="{ color: index === active ? activeColor : deactiveColor }"
            :class="[direction === 'column' ? 'uni-steps__column-title' : 'uni-steps__row-title']"
            >{{ item.title }}</text
          >
          <text
            :style="{ color: deactiveColor }"
            :class="[direction === 'column' ? 'uni-steps__column-desc' : 'uni-steps__row-desc']"
            >{{ item.desc }}</text
          >
        </view>
      </view>
      <view
        :class="[
          direction === 'column' ? 'uni-steps__column-container' : 'uni-steps__row-container',
        ]"
      >
        <view
          :class="[
            direction === 'column' ? 'uni-steps__column-line-item' : 'uni-steps__row-line-item',
          ]"
          v-for="(item, index) in options"
          :key="index"
          :style="{ height: direction === 'column' ? heightArr[index] + 'px' : '14px' }"
        >
          <view
            :class="[
              direction === 'column' ? 'uni-steps__column-line' : 'uni-steps__row-line',
              direction === 'column'
                ? 'uni-steps__column-line--before'
                : 'uni-steps__row-line--before',
            ]"
            :style="{
              backgroundColor:
                index <= active && index !== 0
                  ? activeColor
                  : index === 0
                  ? 'transparent'
                  : deactiveColor,
            }"
          >
          </view>
          <view
            :class="[direction === 'column' ? 'uni-steps__column-check' : 'uni-steps__row-check']"
            v-if="index === active"
          >
            <uni-icons :color="activeColor" :type="activeIcon" size="14" />
          </view>
          <view
            v-else
            :class="[direction === 'column' ? 'uni-steps__column-circle' : 'uni-steps__row-circle']"
            :style="{ backgroundColor: index < active ? activeColor : deactiveColor }"
          />
          <view
            :class="[
              direction === 'column' ? 'uni-steps__column-line' : 'uni-steps__row-line',
              direction === 'column'
                ? 'uni-steps__column-line--after'
                : 'uni-steps__row-line--after',
            ]"
            :style="{
              backgroundColor:
                index < active && index !== options.length - 1
                  ? activeColor
                  : index === options.length - 1
                  ? 'transparent'
                  : deactiveColor,
            }"
          />
        </view>
      </view>
    </view>
  </view>
</template>

<script>
/**
 * Steps 步骤条
 * @description 评分组件
 * @tutorial https://ext.dcloud.net.cn/plugin?id=34
 * @property {Number} active 当前步骤
 * @property {String} direction = [row|column] 当前步骤
 * 	@value row 横向
 * 	@value column 纵向
 * @property {String} activeColor 选中状态的颜色
 * @property {Array} options 数据源，格式为：[{title:'xxx',desc:'xxx'},{title:'xxx',desc:'xxx'}]
 */

export default {
  name: 'UniSteps',
  props: {
    direction: {
      // 排列方向 row column
      type: String,
      default: 'row',
    },
    activeColor: {
      // 激活状态颜色
      type: String,
      default: '#2979FF',
    },
    deactiveColor: {
      // 未激活状态颜色
      type: String,
      default: '#B7BDC6',
    },
    active: {
      // 当前步骤
      type: Number,
      default: 0,
    },
    activeIcon: {
      // 当前步骤
      type: String,
      default: 'checkbox-filled',
    },
    options: {
      type: Array,
      default() {
        return []
      },
    }, // 数据
  },
  data() {
    return {
      heightArr: [],
    }
  },
  mounted() {
    //根据内容设置步骤条的长度
    if (this.direction === 'column') {
      let that = this
      //只能用类选择器，用id选择器所获取的元素信息不准确
      uni
        .createSelectorQuery()
        .in(this)
        .selectAll('.uni-steps__column-text')
        .boundingClientRect((data) => {
          that.heightArr = data.map((item) => item.height + 1)
        })
        .exec()
    }
  },
}
</script>

<style lang="scss">
$uni-primary: #2979ff !default;
$uni-border-color: #ededed;

.uni-steps {
  /* #ifndef APP-NVUE */
  display: flex;
  width: 100%;
  /* #endif */
  /* #ifdef APP-NVUE */
  flex: 1;
  /* #endif */
  flex-direction: column;
}

.uni-steps__row {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: column;
}

.uni-steps__column {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: row-reverse;
}

.uni-steps__row-text-container {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: row;
  align-items: flex-end;
  margin-bottom: 8px;
}

.uni-steps__column-text-container {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: column;
  flex: 1;
}

.uni-steps__row-text {
  /* #ifndef APP-NVUE */
  display: inline-flex;
  /* #endif */
  flex: 1;
  flex-direction: column;
}

.uni-steps__column-text {
  padding: 6px 0px;
  border-bottom-style: solid;
  border-bottom-width: 1px;
  border-bottom-color: $uni-border-color;
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: column;
}

.uni-steps__row-title {
  font-size: 14px;
  line-height: 16px;
  text-align: center;
}

.uni-steps__column-title {
  font-size: 14px;
  text-align: left;
  line-height: 18px;
}

.uni-steps__row-desc {
  font-size: 12px;
  line-height: 14px;
  text-align: center;
}

.uni-steps__column-desc {
  font-size: 12px;
  text-align: left;
  line-height: 18px;
}

.uni-steps__row-container {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: row;
}

.uni-steps__column-container {
  /* #ifndef APP-NVUE */
  display: inline-flex;
  /* #endif */
  width: 30px;
  flex-direction: column;
}

.uni-steps__row-line-item {
  /* #ifndef APP-NVUE */
  display: inline-flex;
  /* #endif */
  flex-direction: row;
  flex: 1;
  height: 14px;
  line-height: 14px;
  align-items: center;
  justify-content: center;
}

.uni-steps__column-line-item {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.uni-steps__row-line {
  flex: 1;
  height: 1px;
  background-color: #b7bdc6;
}

.uni-steps__column-line {
  width: 1px;
  background-color: #b7bdc6;
}

.uni-steps__row-line--after {
  transform: translateX(1px);
}

.uni-steps__column-line--after {
  flex: 1;
  transform: translate(0px, 1px);
}

.uni-steps__row-line--before {
  transform: translateX(-1px);
}

.uni-steps__column-line--before {
  height: 6px;
  transform: translate(0px, -13px);
}

.uni-steps__row-circle {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: #b7bdc6;
  margin: 0px 3px;
}

.uni-steps__column-circle {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: #b7bdc6;
  margin: 4px 0px 5px 0px;
}

.uni-steps__row-check {
  margin: 0px 6px;
}

.uni-steps__column-check {
  height: 14px;
  line-height: 14px;
  margin: 2px 0px;
}
</style>
